The existence of an adaptor molecule which reads the genetic code and binds to specific amino acids was first reported by:

Options

A. Friedrich Griffith
B. James Watson
C. Rosalined Franklin
D. Francis Crick

Explanation

To solve the question regarding the adaptor molecule that reads the genetic code and binds to specific amino acids, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the discovery of an adaptor molecule that is responsible for reading the genetic code and binding to specific amino acids.

2. **Identifying the Adaptor Molecule**: The adaptor molecule in question is known as transfer RNA (tRNA). tRNA plays a crucial role in translating the genetic code from messenger RNA (mRNA) into a sequence of amino acids, which form proteins.

3. **Role of tRNA**: tRNA has specific regions that allow it to recognize and bind to the corresponding codons on the mRNA. Each tRNA molecule carries a specific amino acid that corresponds to the codon it recognizes.

4. **Historical Context**: The concept of tRNA as an adaptor molecule was first proposed by Francis Crick. He introduced the idea that tRNA serves as a bridge between the genetic code in mRNA and the amino acids that make up proteins.

5. **Conclusion**: Therefore, the existence of the adaptor molecule (tRNA) that reads the genetic code and binds to specific amino acids was first reported by Francis Crick.

### Final Answer:
The adaptor molecule which reads the genetic code and binds to specific amino acids was first reported by **Francis Crick**.